Method of preserving wood and wooden structures



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Patented Uct. M, Wfid.

rnrnnnrcn cam. narrnrns, or naunnnncn nus]: menace, GERMANY, assren'onro enonen EMIL STAHL, or .rnnsnr crrr, new JERSEY.,

and useful Improvements in Methods ofv Preserving Wood and WoodenStructures,

of which the following is a specification.

The object of my invention is to protect wood, such as beams, planks,boards and the like, and wooden' structures, such as scaf folding,floors walls and implements against the destructive efiects ,of decaweather conditions, and materials or fiui sto which the wood andstructures may be subjected.-

Many articles of wood and wooden struc tures are left. withoutprotective coverings because of the absence of coverings suited to theirrequirements, and frequently wood and wooden structures are covered withan unsuitable paint that clogs up the pores of the wood and causes thewood to decay from within. Other protective substances applied to woodand wooden structures are unsightly, ill smelling and dangerous to thehealth of persons who may have to handle the same. I

My procem prolon the period of usefulness of wood an wooden structures,preserving their utility five or six times the ength at whichunprotected wood and wooden structures have remained useful. and myinvention presents none of the objectionable features referred to above.

In carrying out my invention the wood is first. given one coat of a moreor less concentrated disinfectant solution, preferably ferrosulfate orsalicylic acid, and when this disinfectant coating becomes dry I applyone coat over the same of pure mineral oil of a character which is freefrom gum. The coating of disinfectant is protected from being rubbed orwashedofi' by means of the coating of mineral oil, and the disinfectantneutralizes the causes of deca from within or from without the wood, bot

the disinfectant and the oil becoming absorbed by the res of the woodbut without clogging t em, since there is no gum or rosin in the oil.The disinfectant is meant to enter the pores of the wood and coat overthe surface of the wood between the pores, and the oil not only protectsthe coatmg of disinfectant and binds the same METHOD OF PRESERVING WOODAND WOO'IDEN STRUCTURES;

' Application filed. December 6, 1921. Serial No. 520,273.

in the wood but prevents moisture from entering into the pores of thewood, while at the same time the oil does not prevent such moisture asmay be within the Wood from evaporating. The oilalso avoids shrinkage ofthe Wood. The oil may be tinted by aniline to suit such demands as mayarise, and I suggest also that an addition of about one-quarter of oneper cent of caraway seed 'oil to the. mineral oil will subdue its odor.I have found that 'the best results are attained when the-disinfectantis ferrosulfate or salicylic acid, but I'do not in every instance wishto be limited to these particular disinfectant materials since otherchemicals of similar nature may be used in lieu thereof.with more orless satisfactory results.

My invention resides, therefore, .in a method of protecting wood andwooden structures, consisting in first applying a primary coating ofdisinfectant solution to the wood and allowing this coating to dry, andthen applying a coating of mineral oil, free of gum or rosin, over thesurface previously coated with the disinfectant. I have found that myinvention serves as a reliable protection to wood and wooden structuresand is new and of material economic value. My invention prevents decayof the wood and protects the same from the deteriorat ing influences ofweather, moisture and many substances which may be brought into contactwith the wood.

- A distinct feature of my invention resides in the fact that inaccordance therewith the pores of the wood are not filled up or cloggedbut on the contrary are leftopen so that such moisture as may be in thewood may evaporate, while at the same time the oil used by me willprevent moisture from entering the wood. I treat .any wooden structurewith my methodat minimum labor and expense and without subjecting thesame to any previous preparatory treat ments such as other preservingprocesses involve. If the wooden structure to be treated should be abarn door, for illustration, I appl the disinfectant solution to thesurface 0 the same by an ordinary brush and then when the wood hasbecome dry I apply the mineral oil to the same by means *ef an ordinarybrush. Thus an .person who is able to handle a paint brus may make useof my invention in the protection and preservation of his own woodenstructures, wliether doors, window-shutters, Window sills or Stairways.The simplicity, cheapness and ready availability of my invention forindividual use are matters of public importance, and these desirableconsiderations are attained by me by reason of the basic conceptionunderlying my invention and differentiating the same from priorprocesses which involve expensive treatments and the absolute filling upof the pores of the wood, whereas, as herembefore explained, myinvention has for its foundation principle the preservation of the woodwithout clogging up-the pores thereof and without SubJecting the woodenstructures to boiling or other treatments which I consider highlydetrimental to the wood and which would ordinarily be impossible ofperformance outside of expensive factory plants.

What I claim as m invention and desire to secure by Letters atent, is:

1. The process of preserving wood and wooden structures and articlesmade from wood, which consists in coatin the wood with a disinfectantsolution, al owing this coating to become dry and then appl ing, thereona coating of mineral oil free om gum or rosin, as described.

2. The process of preserving wood and wooden structures and articlesmade from wood, which consists in coating the wood with a disinfectantsolution, consisting of ferrosulfate, allowing this coating to becomedry and then applying thereon a coating of mineral oil free from gum orrosin, as described.

Signed at F rankfort-on-Main, Germany, and State of Prussia, vember A.D. 1921.

FRIEDRICH CARL MATTHIES.

this 3rd day of No- 40

